Outline of natural classification of the Trilobites.

Beecher, Charles Emerson, 1856-1904.

Outline of natural classification of the Trilobites. By Charles E. Beecher. - [New Haven, 1897] - p. [89]-106, 181-207 illus. 24 cm.

"From the American journal of science, vol. III, March, 1897."

ca 17001098


Trilobites.

QE821 / .B418

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